JPH0485488A - Direction controller of shield excavator - Google Patents

Abstract

PURPOSE:To reduce a price by connecting a front shield to a rear shield, and dividing thrust jacks driving a cutter head fixed to the front shield into a plurality of groups to connect them to directional control valves. CONSTITUTION:A shield excavator 1 is constituted of a cutter head 10, a front shield to bear the perimeter of the cutter head 10 and a rear shield 30, and the rear shield 30 is connected to a segment 40 through a tail packing 31. After that, the front shield 20 is connected to the rear shield 30 through a spherical surface 21 and, at the same time, they are connected with thrust jacks 22 arranged in equal parts in the shape of a circle. In addition, a plurality of thrust jacks 22 are divided into the plural number of groups, and each group is handled as one jack to control stroke. According to the constitution, directional control can be easily controlled.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a direction control device for a solid excavator, and more particularly, a direction control device for a shield excavator with a small radius of curvature for excavating underground, such as a shield machine. Regarding.

(Conventional technology) In the past, efforts were made to enhance public works investment and save labor in various construction works.
As efficiency increases, soled trenching machines are being used.

In a shield tunneling machine, four bins and a thrust jack are installed at the top, bottom, right, and left at the connection between the front and rear shells on the inner circumference of the shield. The connecting portion is bent vertically or horizontally to move the sole-drilling machine. Recently, in order to increase the digging power, shield excavators have been developed by arranging eight or more thrust jacks in a ring inside the shield, and installing one pump, one thrust jack, or an electromagnetic flow valve for each thrust jack. is progressing. At this time, depending on whether the direction of the shield tunneling machine is selected from the thrust jacks of up, down, right, or left, the survey for operation in that direction can be performed by underground sII using Trannot, etc. An optical oscillator that generates coherent light such as a laser is installed in the starting shaft of the shield machine.Costume 1:
)) A method is used in which the deflection and declination angle of the shield machine are measured by irradiating the tunnel plan line with a beam of light and reading the light spot on the target attached to the shield machine.

(Three problems to be solved by the invention) However, according to the former conventional method, ■ To obtain a large propulsive force, high-pressure, large-capacity hydraulic equipment is required, and it is difficult to store it. The shield section also takes up a lot of space.

■ When performing refraction, it is necessary to attach and detach the top and bottom or left and right pins, which makes work difficult.

In the latter case, ■ Pump or electromagnetic flow rate 11? It is necessary to use a large number of I valves depending on the thrust jack, and
Therefore, a large number of sensors are also required, so 1lla1
The circuit becomes complicated and becomes a cost amplifier.

■ Out of multiple thrust jacks, only one is loaded, and the unbalanced load is applied to the segment.

■ If the tunnel to be excavated is curved and the radius of curvature is small, it is necessary to have many fixed points on the side, which requires a lot of man-hours for measurement and is not practical. Furthermore, in the method using laser light, if the tunnel is curved, the laser light from the starting shaft may not be able to irradiate the target, making it necessary to move the optical oscillation device to various positions.

There are other problems.

The present invention focuses on the above-mentioned conventional problems, and relates to a direction control device for a rolled excavation machine, and in particular, the present invention aims to provide a direction control device for a shield excavation machine with a small radius of curvature for excavating underground, such as a shield machine. There is.

(Means for Solving the Problem) In order to achieve the above object, a first invention according to the present invention provides a shield machine path having a cutter head, a front shield and a rear shield that are bent with respect to the excavation direction. In #S, is there a thrust gloss that connects the front shield and the low nord, and also propels the force/7 tahenod that is rotatably fixed to the front shield? Divided into 1Jlk groups,
Thrust jacks within a group are connected to a common directional 'ism valve.

In the invention of '1I42, the thrust jack that refracts the front shield and the rear shield is made up of one thrust jack in a group with a stroke of 7 keys.

(Function) According to the above configuration, a plurality of thrust jacks are divided into upper, lower, left, and right groups, each group is treated like one thrust jack, and the stroke of one thrust jack is controlled. .

For this purpose, it is only necessary to control at least the four thrust jacks on the top, bottom, left and right, and the required equipment such as pumps, electromagnetic flow I'll valves, and sensors can be reduced, reducing costs. , the space to store it can also be reduced.

In addition, the pressure becomes equal load within the group, and the load on the segments can be equalized, and the direction control 31 can be easily controlled.

(Actual Sacrificial Example) The following is a nord! related to the present invention! An example of the direction control device for the iIm aircraft will be explained with reference to the drawings in Section 6'8.
Figure 1 is an overall configuration diagram of the shield excavator equipped with the direction control device of the present invention, Figure 2 is a layout diagram of the shield jack that controls the direction of the shield excavator, and Figure 3 is the direction 'M' of the shield excavator. FIG. 3 is a hydraulic circuit diagram of the control device. In FIG. 1, the /-rudo excavator 1 has a cutter head 10, a front heald 20 that peripherally supports the cutter 10, a rear shield 30 connected to the front shield 20, etc. The shield 30 is in contact with the outer periphery of the segment 40 via a tail packing 31. For power, evening zFlo has a disc cutter 11. A bit I2 and a copicutter 13 are provided. The front shield 20 and the rear shield 30 are connected via a spherical surface 21, and are also connected by thrust jacks 22 that are equally spaced around the circumference. Further, a front gripper 23 is provided on the front shield 10, and a rear gripper 32 is provided on the rear shield 10. Back shield 30! In FIG. 2, the thrust jack 22 has an upper group 24, a lower group 25, a right group 26, and a left group in the forward direction. 27, etc., and are arranged in upper, lower, left, and right groups. Each group 24.25.26.27 includes, for example, three actuators 24a, 2'4b, and 24c. Each group 24.25.2627 has a pump 51.52.53.5 as shown in FIG.
Pressure oil is supplied from 4 through directional control valves 61, 62, 63, and 64. Also, each group 24.25.26.2
one thrust jack of 7, e.g. 24b, 25b
, 26b, 27b have stroke sensors 71, 72.
73.74 are arranged. Pump 51.52.53
An electromagnetic proportional control valve 81.82.83.84 is disposed between the directional control valve 54 and the directional control valve 61.62.63.64.

Next, the operation of the above configuration will be explained.

When performing excavation work Rear gripper 3 of rear shield 30
With the jack 2 stretched on the tunnel wall 2, rotate the thrust jack 22 to extend the thrust jack 22 and start digging.

At this time, the nodal stick 33 is fully contracted, the rear shield 30 is fixed by the rear gripper 32, so no load is applied to the segment 40, and the front gripper 23 is contracted, and the front shield IO
moves forward without resistance. Stroke sensor 717
2.73.74, the rear gripper 32 is retracted and the front gripper 23 of the front shield 10 is stretched against the shaft wall 2. Front gripper 2
3 on the shaft wall 2, the thrust jack 22 is retracted while the silt jack 33 is extended, and the rear shield 30 is moved forward.

When the shield jack 33 is fully retracted, the rear gripper 32 is attached to the shaft wall 2 and the above-mentioned work begins.

The above-mentioned construction 1 is for the case where the excavator is going straight, and when the excavator wants to make a turn, it extends the thrust jack 22 in the opposite direction to the direction in which the excavation is desired. For example, when it is desired to read the right side from both sides, the thrust jack 22 of the t group 27 disposed on the left side is moved forward by a predetermined amount. At this time, while the thrust jacks 22 of the left group 27 are moved forward by a predetermined amount in accordance with the radius of curvature of the bend, the thrust jacks 22 of the right group 26 are moved forward by a predetermined amount.

FIG. 4 shows another embodiment. The thrust jack 22 is
They are divided into eight groups in the forward direction, such as the jonin group 110, the earth and stone group 120, the upper right group 130, the lower right group 140, the lower cloth group 150, the nigga group 160, the lower left group 170, and the upper left group 180. has been done. Each group includes, for example, two thrust jacks 110a and 110b.

In the above configuration, when the user wants to make a right-side turn, the two groups of thrust jaws 7-ki 22 opposite to the direction in which the user wants to make the turn are extended. For example, when you want to turn to the right, the thrust gloss and key 22 of the lower left group 170 and upper left group 180 arranged on the left side are set to a predetermined value.
advance. Also, when you want to dig downward while turning to the right (in the direction of the arrow), the thrust gloss 22 of the lower left group 170 and upper left group 180 arranged on the left side
and moves the jounin group 110 forward by a predetermined amount. Also,
At this time, according to the radius of curvature of the bend, lower left group 17
0, the thrusters of the upper left group 180, the key 22, and the jounin group 110 are advanced by a predetermined amount, and the upper right group 130, the lower right group 140, and the lower cloth group 1 are
50 thrust jack 22 is advanced by a predetermined amount. Furthermore, the amount of excavation to be dug downward is determined by advancing the thrust jack 22 of the lower cloth group 150 by a predetermined amount and adjusting the pressure of the electromagnetic proportional AM valve (not shown) of the lower cloth group 150. Can be dug.

In the above embodiment, the front gripper 23 is provided on the front shield 1O, and the lever gripper 32 is provided on the rear shield 30, but the reaction force of the thrust jack may be received by the segment without attaching the gripper. Also, as I explained with the Nord excavator, Figure 13 of Haku no Ki is the direction of the Nord m excavator;
Needless to say, the present invention can also be applied to a hydraulically constructed machine with a xi wing system.

(Effects of the Invention) As described above, according to the present invention, ri thrust jacks are divided into a plurality of groups, and each group is treated as one jack to control the stroke. As a result, it is only necessary to control at least four jacks, and the number of pumps, electromagnetic IININ response devices, or sensors required for this is reduced, reducing costs and reducing the space for storing them. In addition, the pressure becomes equal load within the group, and the load on the segments can be made even, and a large propulsive force can be obtained, and the excellent effect of being able to easily control the direction I control can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of the shield m-cutting machine of the present invention equipped with a direction control device, Fig. 12 is a layout diagram of the Soldjar tree that moves the direction of the Nund excavator, (jiJ road map, Fig. 4 is the It is a layout diagram of a Nord jack that controls the direction of other Nord excavators. 1... Nord excavator, 10... Cutter head, 20... Front shield, 22... Thrust jack, 30...・Rear shield, 32...Shield jack 40...Segment, 51.52.53.54 61.62.63.64 71.72.73.74...Pump, ...Direction control valve・・・Stroke sensor

Claims (2)

[Claims] (1) In a shield excavator having a cutter head and a front shield and a rear shield that are bent with respect to the excavation direction, the front shield and the rear shield are connected and are rotatably fixed to the front shield. A directional control device for a shield excavator, characterized in that thrust jacks for propelling a cutter head are divided into multiple groups, and the thrust jacks in the groups are connected to a common directional control valve. (2) The direction control device for a shield excavator according to claim 1, wherein the thrust jack that bends the front shield and the rear shield is controlled by the stroke of one thrust jack in the group.